river road at dowell road intersection safety …
TRANSCRIPT
RIVER ROAD AT DOWELL ROADINTERSECTION SAFETY INTERSECTION SAFETY IMPROVEMENTSINFORMATION MEETING
MCHENRY COUNTYDIVISION OF TRANSPORTATION
BOLLINGER, LACH & ASSOCIATES, INC.
June 11, 2012
M i T i d PMeeting Topics and Purpose
• Purpose and need• Alternatives explored
• Traffic signal
• Roundabout
• Project schedule• Questions?Questions?
Project Locationj
River/Dowell
Village Hall
Project Purpose and Needj p
• Improve public safety and transportation across the County
• Geometryo 90o preferredo 30o currentlyo 30 cu e y Poor visibility Poor turn
maneuverability
• 14 crashes from 2008-2011
Existing Level of Service (LOS)g ( )
2040• Currently LOS F
• Heavy right turn WB on Dowell
399 (119)
1237 (706)
PEAK HOUR VOLUMES
• Heavy left turn SB
• Heavy thru traffic on River
125 (439)
423 (335)
1237 (706)
517 (249)
760 (976)Control Delay
(s/vehicle)LOS
0-10 A
10 15 B
Legend:
>10-15 B
>15-25 C
>25-35 D
>35-50 E000 (000) = AM (PM)>50 F
Highway Capacity Manual, 2010 Edition
Al i E l dAlternatives Explored
Warrant
NOT METWarrant
METWarrant
METNOT MET MET4 hour volumes/delays8 hour volumes/delays
MET
Alternative 1A – Traffic Signalg
• 90o angle
• Limitso Lily Lake –
Breezy Laneo River Road –
Highwood R dRoad
• Removalso Buildingo Buildingo Billboardo Dowell Road
connection
Alternative 1A – Lane Configuration
2040 LOS C
Two thru lanes needed for
th d th north and south on River
Right and left turn lanes for turn lanes for EB traffic
Two left turn lanes for SB River
Right turn lane for NB River
Alternative 1A – Access Concerns
• Mackey’s Hideout Bar
o Improve f safety
concerns
• Property access to the north
Th C t• Thomas Court
Alternative 1A – Dowell Rd Backupsp
2012 backups2012 backups(175 ft. +/-)
2040 backups(315 ft. +/-)
• North accesso Entering and
exiting concerns
• A f Ri • Access from River Road will not work
• Thomas Court –restricted right-restricted rightin/right-out
Alternative 1A – River Rd Backupsp
2012 backups(300 ft. +/-)
2040 backups(900 ft. +/-)
Potential cut thru traffic on Breezy Lane to Thomas Court
Alternative 1B – Thomas Ct off River
• Access restricted
• Potential • Potential rear end collisions in NB River right turn lane
• Additional impervious area
Alternative 1C – Thomas Ct cul-de-sac
Emergency access
Eliminates second access for Thomas Court
Alternative 2 – Roundabout
• 90o angle
• Limitso Lily Lake –
Breezy Laneo River Road –
Highwood R dRoad
• Removalso Buildingo Buildingo Billboardo Dowell Road
connection
Alternative 2 – Lane Configurationg
• 2040 LOS B
• Two thru lanes on RiverRiver
• Isolated rights off of River and ff f off of
Dowell
• Left turns will travel will travel thru the roundabout
Alternative 2 – Access Concerns
• Yield vs. stop
• Designated Lanes on Entry - Easier decision ymaking
• Fewer backups
• Geometric flexibility
• Full access to Thomas CourtCourt
Alternative 2 – Dowell Rd Backupsp
2012 backups(175 ft. +/-)
2040 backups(300 ft. +/-)
• Fewer backups
• Safe location for North Drive and North Drive and Thomas Court turning movements
Alternative 2 – River Rd Backupsp
2012 backups(175 ft. +/-)
2040 backups2040 backups(450 ft. +/-)
• Minimize potential cut thru traffic on Thomas Court
FHWA Vidhttp://safety.fhwa.dot.gov/intersection/roundabouts/fhwasa10023/wmv cc final/10-2124 Roundabouts.wmv
FHWA Videop // y g / / / / _ _ / _
City of Issaquah, Washington
Hunt Club Road at Wadsworth Road –near Gurnee Mills
River Road at Roberts Road - BarringtonMinnesota
ROUNDABOUTS
BUILT PROJECTS RIVER ROAD AT DOWELL ROAD
FUTURE PROJECTS
Drainageg
Culverts will be repaired or maintained
Potential drainage storage garea
L d A i i iAlternatives are continuing to be evaluated to
Land AcquisitionAlternatives are continuing to be evaluated to minimize impacts. Purchase of right of way or easements will be necessary. MCDOT follows the Federal Uniform Act for local land acquisition.
T ffi D i C iTraffic During Construction
• One lane open in each direction
• Some short-term lane closures and lane shifts
• Driveway access will always be ymaintained
RECAP Al iRECAP Alternatives
ALTERNATIVE 1 - TRAFFIC SIGNAL
• $2.8 million
ALTERNATIVE 2 – ROUNDABOUT
• $2.4 million
• LOS C
• Right of way
• Thomas Court access concerns
• LOS B
• Right of way
• Flexibility with accessesThomas Court access concerns
• Thomas Court used as cut-thru
Flexibility with accesses
• Shorter backups
• Minimize cut-thru traffic on Thomas
• Safety
Project Schedulej
This schedule is meant as a guide and is subject to change
C i
A i i d l i i
Construction
Anticipated to last an entire construction season
NEXT STEPSNEXT STEPS…
• Receive public comments• Alternative selection• Phase II Engineering and Design Permitting• Land acquisition
Q i ?Wally Dittrich Design Manager
Questions?Wally Dittrich - Design ManagerMcHenry County Division of Transportation815-334-4980, [email protected]
Ci d Fl P j t MCindy Flower - Project ManagerBollinger, Lach & Associates, Inc.630-438-6400, [email protected] 0 6 00, @ g